On 8/29/07, Anne Archibald <[EMAIL PROTECTED]> wrote:
>
> On 29/08/2007, Charles R Harris <[EMAIL PROTECTED]> wrote:
>
> > > Is this also appropriate for the other FFTs? (inverse real, complex,
> > > hermitian, what have you) I have written a quick hack (attached) that
> > > should do just that res
On 29/08/2007, Charles R Harris <[EMAIL PROTECTED]> wrote:
> > Is this also appropriate for the other FFTs? (inverse real, complex,
> > hermitian, what have you) I have written a quick hack (attached) that
> > should do just that rescaling, but I don't know that it's a good idea,
> > as implemente
Hi Anne,
On 8/29/07, Anne Archibald <[EMAIL PROTECTED]> wrote:
>
> On 29/08/2007, Charles R Harris <[EMAIL PROTECTED]> wrote:
> >
> > > What is going on is that the coefficient at the Nyquist frequency
> appears
> > once in the unextended array, but twice when the array is extended with
> > zeros
On 29/08/2007, Charles R Harris <[EMAIL PROTECTED]> wrote:
>
> > What is going on is that the coefficient at the Nyquist frequency appears
> once in the unextended array, but twice when the array is extended with
> zeros because of the Hermitean symmetry. That should probably be fixed in
> the ups
On 8/29/07, Charles R Harris <[EMAIL PROTECTED]> wrote:
>
> Anne,
>
> On 8/29/07, Anne Archibald <[EMAIL PROTECTED]> wrote:
> >
> > Hi,
> >
> > numpy's Fourier transforms have the handy feature of being able to
> > upsample and downsample signals; for example the documentation cites
> > irfft(rfft(
Anne,
On 8/29/07, Anne Archibald <[EMAIL PROTECTED]> wrote:
>
> Hi,
>
> numpy's Fourier transforms have the handy feature of being able to
> upsample and downsample signals; for example the documentation cites
> irfft(rfft(A),16*len(A)) as a way to get a Fourier interpolation of A.
> However, ther
Hi,
numpy's Fourier transforms have the handy feature of being able to
upsample and downsample signals; for example the documentation cites
irfft(rfft(A),16*len(A)) as a way to get a Fourier interpolation of A.
However, there is a peculiarity with the way numpy handles the
highest-frequency coeffi
